CVE-2026-42025: Buffer Overflow

Published Oct 20, 2026

Updated

Multiple exploitable stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup dhcpdns functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities. This vulnerability concerns the dhcpdns1 parameter.

Affected Software

1 affected component

TOTOLINK X2000R=TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327

Event History

Oct 20, 2026

CVE Published

via MITRE·08:25 PM

Data Sourced

via MITRE·08:25 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·09:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What access does an attacker need to exploit this vulnerability?

An attacker needs authenticated access to the device's HTTP interface. No user interaction is required once the attacker can send the crafted request.

Which systems are known to be affected?

The affected product identified is the TOTOLINK X2000R running firmware TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. The issue is in the boa formIpv6Setup dhcp_dns functionality, specifically the dhcp_dns1 parameter.

What is the potential impact of successful exploitation?

A crafted HTTP request can trigger a stack-based buffer overflow and lead to arbitrary code execution. The reported impact includes compromise of confidentiality, integrity, and availability.

CVE-2026-42025: Buffer Overflow

Affected Software

Event History

Frequently Asked Questions

What access does an attacker need to exploit this vulnerability?

Which systems are known to be affected?

What is the potential impact of successful exploitation?

Company

Resources

Contact

Frequently Asked Questions

What access does an attacker need to exploit this vulnerability?

Which systems are known to be affected?

What is the potential impact of successful exploitation?